James St. John: Megarippled limestone (Waynesville Formation, U.Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 1
James St. John: Megarippled limestone (Waynesville Formation, U.Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 2
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 1
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 2
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 3
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 4
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 5
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 6
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 7
James St. John: Megarippled limestone (Waynesville Formation, Upper Ordovician; Flat Fork, Warren County, Ohio, USA) 8